Eggshell Structure
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Biodegradation of Poly (3-hydroxybutyrate) /Eggshellsystems
In this work, biocomposites of poly (3-hydroxybutyrate) (PHB) / calcium carbonate from Rhea Americana eggshells were prepared and the effects of the addition of the inorganic filler in the polymeric matrix were assessed. The residue (powder) of the eggshell calcined at 400 ºC or in natura was inserted into a PHB solution for preparation of films via casting
Mat. Res.. Publicado em: 21/05/2018
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2. Composite Superabsorbent Hydrogel of Acrylic Copolymer and Eggshell: Effect of Biofiller Addition
Eggshell (ES) is an abundant waste material which is mainly composed of calcium carbonate. A superabsorbent hydrogel composite based on poly(acrylamide-co-potassium acrylate) as matrix containing 17 wt.% of chicken ES powder as a filler was synthesized and compared with the gel without filler. The characterization was carried out by Fourier transform infrare
J. Braz. Chem. Soc.. Publicado em: 2017-10
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3. Experimental Study on the Geometrical and Mechanical Properties of Goose Eggshells
ABSTRACT This paper examined the properties of goose eggshells to determine possible areas of improvement in egg transport and storage. First, we measured goose egg sizes and performed statistical tests, and found that the major axis, minor axis, and egg-shape index presented normal distribution. Eggshell thickness first increased and then decreased from the
Rev. Bras. Cienc. Avic.. Publicado em: 2017-09
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4. Photonic Imaging with Optical Coherence Tomography for Quality Monitoring in the Poultry Industry: a Preliminary Study
ABSTRACTA photonic imaging method that gives the possibility to measure egg quality was applied. Since the method is non-contact and non-destructive we believe that this photonic imaging method may be successfully integrated in the automated inspection systems in the poultry industry. The method involves scanning an invisible infrared light beam over the egg
Rev. Bras. Cienc. Avic.. Publicado em: 2015-09
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5. Influence of european quail breeders age on egg quality, incubation, fertility and progeny performance
The influence of age (85, 140, and 270 days) of European quails breeders on the egg quality and hatching, fertility and progeny performance was evaluated. The experimental design was completely randomized in a 3x3 factorial arrangement (females' age x males' age), with ten replicates and six birds per experimental unit (four females and two males). Egg produ
Rev. Bras. Cienc. Avic.. Publicado em: 2015-03
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6. Aspectos evolutivos da história de vida e estrutura da casca do ovo de lagartos tropiduríneos / Evolutive aspects of life history and eggshell morphology of Tropidurinae lizards
In lizards, life history components have great phenotypic plasticity and evolve in a correlated way. Clutch size, for example, tends to be positively correlated to body size of gravid females, when comparing different evolutive lineages or different individuals, though some kinds of habit seems to restrict larger clutches. There are indications that other fa
Publicado em: 2010
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7. Taxonomic identification of the Megaloolithid egg and eggshells from the Cretaceous Bauru Basin (Minas Gerais, Brazil): comparison with the Auca Mahuevo (Argentina) titanosaurid eggs
Os ovos e cascas de ovos provenientes de Auca Mahuevo (Patagonia, Argentina) e identificados taxonomicamente como sendo de titanossaurídeos servem de base para comparação e identificação de ovos megaloolithídeos encontrados em outras localidades. Investigações prévias detreminaram que os materialis oológicos encontrados em Neuquén (Megaloolithus p
Papéis Avulsos de Zoologia (São Paulo). Publicado em: 2007
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8. Research on eggshell structure and quality: an historical overview
The eggshell is an important structure for two reasons. Firstly it forms an embryonic chamber for the developing chick, providing mechanical protection and a controlled gas exchange medium. Secondly it is a container for the market egg, providing protection of the contents and a unique package for a valuable food. The superficial structure of the shell has b
Revista Brasileira de Ciência Avícola. Publicado em: 2005-06
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9. Ootaxonomic investigation of five Lutzomyia species (Diptera, Psychodidae) from Venezuela
The eggshell fine structure of five sand fly species from Venezuela belonging to the genus Lutzomyia (L. migonei, L. ovallesi, L. absonodonta, L. gomezi and L. panamensis) was examined by scanning electron microscopy. The chorionic sculpturing of L. migonei, L. ovallesi, L. absonodonta and L. gomezi was characterized by series of columns arranged in palisade
Memórias do Instituto Oswaldo Cruz. Publicado em: 2001-02
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10. Genetic Analysis of Two Female-Sterile Loci Affecting Eggshell Integrity and Embryonic Pattern Formation in Drosophila Melanogaster
We have analyzed female-sterile mutations at the X-linked loci fs(1)Nas and fs(1)ph which show allele-specific effects on egg shell structure and embryonic pattern formation. The majority of mutant alleles at both loci lead to a collapsed egg phenotype. The maternal effect lethal phenotype is characterized by cuticle defects resembling those found in three a